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Study of scalar meson a0(980) from B → a0(980)π decays
引用本文:张志清,肖振军.Study of scalar meson a0(980) from B → a0(980)π decays[J].中国物理 C,2010,34(5):528-534.
作者姓名:张志清  肖振军
作者单位:Department of Physics, Henan University of Technology, Zhengzhou, Henan 450052, China; Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210097, China
基金项目:Supported by National Natural Science Foundation of China (10575052, 10735080)
摘    要:In this paper, we calculate the branching ratios and the direct CP-violating asymmetries for decays B^0 → a0^0(980)π^0, a0^+ (980)π^-, a0^-(980)π^+ and B^- → a0^0 (980)π^-, a0^- (980)π^0 by employing the perturbative QCD (pQCD) factorization approach at the leading order. We found that (a) the pQCD predictions for the branching ratios are around (0.4-2.8) × 10^-6, consistent with currently available experimental upper limits; (b) the CP asymmetries of B^0→ a0^0(980)π^0 and B^- → a0^- (980)π^0 decays can be large, about (70-80)% for α= 100°.

关 键 词:衰变分支比  π  微扰QCD  介子  标量  CP破坏  不对称  因子化
收稿时间:2009-7-22
修稿时间:2009-12-10
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